WO2021103892A1

WO2021103892A1 - Lighting device and lighting system

Info

Publication number: WO2021103892A1
Application number: PCT/CN2020/123799
Authority: WO
Inventors: 张权; 胡军楚
Original assignee: 深圳市绎立锐光科技开发有限公司
Priority date: 2019-11-27
Filing date: 2020-10-27
Publication date: 2021-06-03
Also published as: CN211509384U

Abstract

Embodiments of the present application provide a lighting device and a lighting system. The lighting device comprises a light source, a first lens group, a second lens group, and a filter group, wherein the light source is used for emitting light, and the first lens group receives and transmits the light. The second lens group comprises a condensing lens and a field lens; the condensing lens is located between the first lens group and the field lens; the filter group comprises a first filter and a second filter, wherein the first filter is provided between the condensing lens and the field lens, and the second filter is provided between the field lens and the focal plane of the second lens group. By providing the second filter between the field lens and the focal plane, an angle difference between the center and the edge of a light source irradiation area on the filter can be reduced, and a color difference between the center and the edge of the light source group irradiation area is eliminated. The lighting system comprises the lighting device and a control unit used for controlling the lighting device, and work of the lighting device is better controlled.

Description

Lighting device and lighting system

Technical field

This application relates to the field of optical equipment, in particular to a lighting device and a lighting system.

Background technique

In the prior art, a variety of spotlights are usually used on the stage. The spotlight emits multiple colors of colored light and matches the lights of multiple colors to meet the needs of various performances and activities. However, the existing stage lights For different areas of the illumination range, the light is uneven.

Utility model content

The purpose of the present application is to provide a lighting device and a lighting system, so that the light within the illumination range of the lighting device is more uniform.

In a first aspect, an embodiment of the present application provides a lighting device, including a light source, a first lens group, a second lens group, and a filter group. The light source is used to emit light, and the first lens group receives and transmits light. The second lens group includes a condenser lens and a field lens. The condenser lens is located in the first lens group and the field lens. The filter group includes a first filter and a second filter. The first filter is arranged between the condenser lens and the field lens. , The second filter is arranged between the field lens and the focal plane of the second lens group.

In some embodiments, the filter set includes at least one magenta filter, at least one magenta filter, at least one cyan filter, and at least one color temperature reducing plate; the first filter is selected from yellow filters One or a combination of one or more of the filter, magenta filter, cyan filter, and color temperature drop, the second filter is selected from the group consisting of yellow filter, magenta filter, cyan filter and drop A combination of one or more of the color temperature tablets is in some embodiments.

In some embodiments, the second filter includes at least a magenta filter.

In some embodiments, any one of the yellow filter, the magenta filter, the cyan filter, and the color temperature reducing film includes a substrate and a filter film, and the filter film includes a laminated first region and a second region The second area covers the surface of the substrate, the first area covers the surface of the second area, the second area has a uniform thickness, the first area has a non-uniform thickness, and the first area faces the incident direction of the light.

In some embodiments, the thickness of the second region is greater than or equal to the maximum thickness of the first region.

The first lens group includes a collimator lens and a fly-eye lens group. The collimator lens receives and transmits light emitted by the light source. The light source includes a plurality of light source units. The collimator lens includes a plurality of collimator lens units. One collimating lens unit is arranged in one-to-one correspondence; the fly-eye lens group receives and transmits the light emitted by the collimating lens.

In some embodiments, the fly-eye lens group includes a first fly-eye lens and a second fly-eye lens, and the first fly-eye lens and the second fly-eye lens are spaced apart and are mirror images of each other.

In some embodiments, the second fly-eye lens is located at the focal point of the first fly-eye lens.

In some embodiments, both the condenser lens and the field lens are convex lenses.

In a second aspect, an embodiment of the present application provides a lighting system, including the above-mentioned lighting device and a control unit for controlling the lighting device.

In the lighting device provided by the present application, by setting the second filter between the field lens and the focal plane, the angle difference between the center and the edge of the light source irradiation area on the filter can be reduced, and the difference between the center and the edge of the light source group's irradiation area can be eliminated. Color difference.

In the lighting system provided by the present application, by applying the above-mentioned lighting device and controlling the lighting device through a control unit, the light emitted by the lighting system is more uniform, and the chromatic aberration between the central irradiation area and the edge irradiation area is eliminated.

These and other aspects of the application will be more concise and understandable in the description of the following embodiments.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

FIG. 1 is a schematic structural diagram of a lighting device shown in this embodiment;

Fig. 2 is a schematic structural diagram of a lighting device provided by an embodiment of the present application;

Fig. 3 is a schematic diagram of a lighting device provided by an embodiment of the present application;

FIG. 4 is a distribution diagram of a central field of view and an edge field of view shown in this embodiment;

Fig. 5 is a distribution diagram of the central field of view and the peripheral field of view of the lighting device shown in Fig. 2;

6 is a partial cross-sectional structure diagram of a filter provided by an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a lighting device in another implementation manner according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a lighting device in another implementation manner according to an embodiment of the present application;

Fig. 9 is a schematic structural diagram of a lighting system provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

Figure 1 shows a schematic structural diagram of a lighting device, in which the light source 50 emits light, the light passes through the lens group 60 and then irradiates the lens 70, the light passes through the lens 70 and then passes through the filter 80, and the light is converged and concentrated in the focal plane 200.上Form a pattern. Among them, the angle of light irradiated to the central field of view b when passing through the filter 80 is relatively small, while the angle of light irradiated to the edge field of view a and c when irradiated to the filter 80 is relatively large. The filter 80 has the following characteristics: the cut-off wavelength of light with different incident angles will drift, the larger the angle, the drift in the short-wave direction; the smaller the angle, the drift in the long-wave direction. Therefore, the color from the center to the edge of the illuminated area will gradually change, making the color uneven.

In order to reduce or even eliminate the color difference between the center and the edge of the illumination range of the lighting device. The inventor proposes the lighting device and a lighting system in the embodiments of the present application. Hereinafter, each embodiment of the present application will be described in detail with reference to the accompanying drawings.

Referring to FIG. 2, a lighting device 10 provided in this embodiment includes a light source 100, a first lens group 110, a second lens group 120 and a filter group 130.

The light source 100 is used to emit light. In some embodiments, the light source 100 includes multiple light source units 1002, and the multiple light source units 1002 may be arranged side by side and emit light toward the same direction. The intensity of the light emitted by the light source 100 in the same direction is enhanced. In some embodiments, the light source 100 may be a light-emitting diode, which has the advantages of high light efficiency, good light quality, low energy consumption, long life, and small size. It is understandable that the light source 100 may also be other types of light sources. , Such as ultra-high pressure mercury light sources, gas discharge lamps and incandescent lamps.

The first lens group 110 receives and transmits the light emitted by the light source. In some embodiments, the first lens group 110 includes a collimator lens 112 and a fly-eye lens group 114. The collimator lens 112 receives and transmits the light emitted by the light source 100. The collimating lens 112 is used to collimate the received light emitted by the light source 100 into parallel light. In some embodiments, the collimating lens 112 includes a plurality of collimating lens units 1122, and each light source unit 1002 can be arranged corresponding to one collimating lens unit 1122, so that the light emitted by the light source 100 can be collimated to the greatest extent. Furthermore, each beam of light is collimated to ensure that the light emitted by the light source unit 1002 can pass through the collimating lens 112 to the greatest extent, and the degree of collimation of the light is improved. The fly-eye lens group 114 receives and transmits light emitted by the collimator lens 112. In some embodiments, the fly-eye lens group 114 includes a first fly-eye lens 1142 and a second fly-eye lens 1144, a first fly-eye lens 1142 and a second fly-eye lens 1144 They are arranged at intervals and are mirror images of each other. Since the first fly-eye lens 1142 divides the entire wide beam into multiple small beams for illumination, the second fly-eye lens 1144 can compensate for the light of the first fly-eye lens 1142, so that the entire second fly-eye lens 1144 The transmitted light is more uniform.

In some embodiments, the second fly-eye lens 1144 is located at the focal point of the first fly-eye lens 1142, so that the light transmitted by each small lens of the first fly-eye lens 1142 can be focused on the center of the small lens of the corresponding second fly-eye lens 1144 In this way, the loss of light energy can be reduced, and a higher light energy utilization rate can be obtained. Of course, it is understandable that the first lens group 110 may also include other types of lenses, and the collimator lens 112 and the fly-eye lens group 114 may also be arranged and combined, which is not limited in this application.

The second lens group 120 includes a condenser lens 122 and a field lens 124. The condenser lens 122 is located between the first lens group 110 and the field lens 124. The condenser lens 122 is located between the first lens group 110 and the field lens 124, which means that the condenser lens 122 receives the first lens group. The light transmitted by the lens group 110 passes through the condenser lens 122 and then passes through the field lens 124. In some embodiments, the condenser lens 122 and the field lens 124 are both convex lenses, and the convex lens can direct the light toward the light of the condenser lens 122 and the field lens 124. Axis deflection, by setting the condenser lens 122 and the field lens 124, the light irradiated on the filter set 130 can be more focused, and the cross-sectional area of the spot can be reduced. It is understandable that the convex lens can be a double convex lens or a plano-convex lens. And meniscus lens.

Please refer to FIG. 2 again. The filter set 130 includes a first filter 132 and a second filter 134, and the first filter 132 is disposed between the condenser 122 and the field lens 124. By setting the condenser lens 122 and the field lens 124, the power of one condenser lens 122 can be reduced. After the condenser lens 122 refracts the light once, the light enters the first filter 132, relative to the incident angle of the first filter 132 The change occurs. At this time, the difference between the incident angle of the light in the central field of view b and the incident angle of the light in the peripheral fields of view a and c is reduced, and the light in the central field of view b and the peripheral fields of view a and c are more uniform. Further, the second filter 134 is disposed between the field lens 124 and the focal plane 200 of the second lens group 120. Please refer to FIG. 2 and FIG. 3 together to further reduce the light passing through the field lens 124. The angle difference on the second filter 134, where the angle difference refers to the incident angle α of the light projected to the central field of view b when it enters the second filter 134 and the angle of incidence α to the edge fields of view a and c. The difference between the incident angle β when the light enters the second filter 134, the cutoff wavelength based on the different incident angles of the second filter 134 will shift, the larger the angle, the shift to shortwave; the smaller the angle, the The characteristics of long-wave drift. When the angle difference is reduced, the wavelength drift of the second filter 134 is relatively smaller, so as to reduce the loss of the focal plane 200 when the second filter 134 is penetrated and irradiated to the focal plane 200. The color non-uniformity of the center field of view b and the edge fields of view a and c.

2 again, in some embodiments, the filter set 130 includes at least one magenta filter 1304, at least one yellow filter 1302, at least one cyan filter 1306, and at least one color temperature reducing film 1308. Among them, the first filter 132 is selected from one or a combination of a magenta filter 1304, a yellow filter 1302, a cyan filter 1306, and a color temperature reducing film 1308, and the second filter 134 is selected from From one or a combination of magenta filter 1304, yellow filter 1302, cyan filter 1306, and color temperature reduction film 1308. Among them, the yellow filter 1302 refers to the high-pass optical film coated with anti-blue light band, the magenta filter 1304 refers to the band-pass optical film coated with anti-green light band, and the cyan filter 1306 refers to the coated optical film. There is a low-pass optical film that reflects the red light band, and the color temperature reduction film 1308 is used to reduce the color temperature, concentrate the energy of the light source, have a light-gathering effect, and can increase the light intensity.

Since the characteristic of the filter set 130 is that the cut-off wavelength of different incident angles will shift, the larger the angle, the shift toward short waves; the smaller the angle, the shift toward long waves, resulting in uneven color distribution. Since the magenta filter 1304 has a double cut-off wavelength, the color unevenness of the band pass filter will be more obvious. Therefore, in some embodiments, the second filter 134 includes at least the magenta filter 1304. The field of view distribution diagrams of the lighting device 10 obtained by comparing the magenta filter 1304 at different positions are shown in Figs. 4 and 5, where Fig. 4 shows when the magenta filter 1304 and the yellow filter 1302, the cyan filter 1306, and the color temperature reduction film 1308 serve as the first filter 132, and the second filter 134 does not include the magenta filter 1304, the yellow filter 1302, the cyan filter 1306, and the color temperature reduction filter 132 The field of view distribution diagram at the time of the film 1308, further, the maximum incident angle of the light in the central field of view b to the magenta filter 1304 is approximately 19° to 23°, and the average value is approximately 9° to 11°. The maximum incident angle of the rays of field a and c to the magenta filter 1304 is approximately 28° to 32°, the average value is approximately 12° to 15°, and the maximum value of the difference between the two incident angles is approximately 8° to 10°, the average value of the difference between the two incident angles is approximately 2° to 4°.

FIG. 5 shows the field of view distribution when only the magenta filter 1304 is used as the second filter 134, the yellow filter 1302, the cyan filter 1306, and the color temperature reducing film 1308 are used as the first filter 132 at the same time. In the figure, further, the maximum incident angle of the light in the central field of view b to the magenta filter 1034 is approximately 17° to 19°, and the average value is approximately 8° to 10°. The pair of rays in the edge field of view a and c The maximum incident angle of the magenta filter 1304 is approximately 20° to 23°, and the average value is approximately 8° to 10°. The maximum value of the difference between the two incident angles is approximately 2° to 4°. The average value of the difference is approximately 0.3° to 2°.

It can be understood that when the magenta filter 1304 is set at the position of the second filter 132, the incident angle difference between the central field of view b and the edge fields of view a and c is smaller than that of the magenta filter 1304 set at the first position. When the filter 134 is at the position, the incident angle difference between the central field of view b and the edge field of view a and c.

Among them, the zero point in Figures 4 and 5 is the center of the central field of view b, the abscissa is the drift distance of the light relative to the central field of view b, and the ordinate is the angle at which the light irradiates the second filter 134, in the figure 310 represents the angular distribution curve of the central field of view b when the magenta filter 1304 is located on the

first filter

132, and 320 represents the edge field of view a and c when the magenta filter 1304 is located on the first filter 132 Angle distribution curve, 330 represents the angular distribution curve of the central field of view b when the magenta filter 1304 is located on the

second filter

134, and 340 represents the edge field of view when the magenta filter 1304 is located on the second filter 134 The angle distribution curves of a and c can be seen by comparison. When the magenta filter 1304 is used as the second filter 134, the central field of view b and the edge fields of view a and c can be further reduced in the green filter 1304. The above angle difference can reduce the unevenness of the color, can realize the uniform color of the picture, and can reduce the reflection of the emitted light in the optical path through the second filter 134, and improve the reliability and stability of the lighting device.

Further, in some embodiments, the filter set 130 may only include a yellow filter 1302, a magenta filter 1304, a cyan filter 1306, and a color temperature reducing film 1308. At this time, it can be guaranteed The intensity and brightness of the light. Can save costs and prevent too low light intensity. It should be understood that in some other embodiments, at least one yellow filter 1302, at least one magenta filter 1304, at least one cyan filter 1306, and at least one color temperature reducing film 1308 may be provided.

Referring to FIG. 6, in some embodiments, any one of the magenta filter 1304, the yellow filter 1302, the cyan filter 1306, and the color temperature reducing film 1308 may include a substrate 160 and a filter film 170. The filter film 170 includes a laminated first region 172 and a second region 174. The second region 174 covers the surface of the substrate 160, and the first region 172 covers the surface of the second region 174, that is, the second region 174 is located in the first region 172. And between the substrate 160. The second region 174 has a uniform thickness, and the first region 172 has a non-uniform thickness. The uniform thickness means that the thickness of the second region 174 is the same everywhere, and the non-uniform thickness refers to the thickness of the first region 172 everywhere. The thickness values are not exactly the same. The first area 172 faces the incident direction of the light, that is, when the light is installed, the light first enters the first area 172 and then enters the second area 174 from the first area 172.

Since the thickness of the first area 172 is not uniform, it is equivalent to forming a concave-convex structure in the first area 172. When light enters the first area 172, various colors of light in the light are projected out and appear in different shades of color. Makes the light more gentle and eases the gradient of discoloration. When light enters the second area 174 from the first area 172, since the thickness of the second area 174 is uniform, the color depth projected from the second area is maintained.

In some embodiments, the thickness of the second region 174 is greater than or equal to the maximum thickness of the first region 172. Since the thickness of the first region 172 is less than the thickness of the second region 174, the gradient of light transformation in the first region 172 will not It is too large, so when the light spreads in the first area 172, the color change of the light is further smooth, and when the light emitted from the first area 172 area is mixed with other light, the color change gradient is relaxed, so that the color change is for the human eye. , It is uniform, and there will be no severe color unevenness.

In some embodiments, referring to FIG. 7, the first filter 132 may include a yellow filter 1302 and a color temperature reducing film 1308, and the second filter 134 may include a magenta filter 1304 and a cyan filter 1306. When the second filter 134 includes the magenta filter 1304 and the cyan filter 1306, the light passing through the field lens 124 will be deflected toward the optical axis once, because the light of the edge field of view a and c enter the field lens The incident angle A of the 124 is greater than the incident angle B of the central field of view b entering the field lens 124. Due to the feature of the same refractive index, the deflection angle of the incident angle A is greater than the deflection angle of the incident angle B, resulting in a fringe field of view The degree of change of the incident angle C of the light of a and c entering the second filter 134 is greater than the degree of change of the incident angle D of the light of the central field of view b entering the second filter 134, thereby reducing the central field of view b The angle difference between the light from the edge field of view a and c irradiating the second filter 134 can reduce the drift of the light on the magenta filter 1304 and the cyan filter 1306, so that the lighting device 10 The light is even.

In some embodiments, referring to FIG. 8, the first filter 132 may include a cyan filter 1306 and a color temperature reducing film 1308, and the second filter 134 may include a magenta filter 1304 and a yellow filter 1302. When the second filter 134 includes the magenta filter 1304 and the yellow filter 1302, the light passing through the field lens 124 will be deflected toward the optical axis once, because the light of the edge field of view a and c enter the field lens The incident angle E of the 124 is greater than the incident angle F of the central field of view b into the field lens 124. Due to the feature of the same refractive index, the deflection angle of the incident angle E is greater than the deflection angle of the incident angle F, resulting in a fringe field of view The degree of change of the incident angle G of the light of a and c entering the second filter 134 is greater than the degree of change of the incident angle H of the light of the central field of view b entering the second filter 134, thereby reducing the central field of view b The angle difference between the light from the edge field of view a and c on the second filter 134 can reduce the drift of the light on the magenta filter 1304 and the yellow filter 1302, so that the lighting device 10 The light is even.

In the illumination device 10 provided in this embodiment, during the irradiation process, the light emitted by the light source 100 irradiates the collimator lens 112 and collimates the light, and the collimated light irradiates the fly-eye lens group 114 and enters the fly-eye lens group 114 Through the integration of the first fly-eye lens 1142 and the second fly-eye lens 1144, the light uniformity and illumination brightness can be improved. The light passing through the fly-eye lens group 114 illuminates the condenser 122. The condenser 122 is a convex lens that can make the light along The direction of the central axis of the condenser 122 is deflected, and the deflected light passes through the first filter 132. By setting the first filter 132, the angle of the light passing through the first filter 132 in the central field of view is the same as that of the first filter 132. The angle difference of the edge field of view passing through the first filter 132 will be reduced. The light transmitted from the first filter 132 irradiates the field lens 124. The field lens 124 is a convex lens, which further deflects the light. The transmitted light irradiates the second filter 134. Due to the deflection of the field lens 124, the angle difference between the center and the edge on the second filter 134 can be reduced, thereby eliminating the color difference between the center area and the edge area. , The light transmitted from the second filter 134 finally converges on the focal plane 200 and forms a pattern.

2 and 9 together, this embodiment also provides a lighting system, including a plurality of the above-mentioned lighting devices 10 and a control unit 20 for controlling the lighting devices, the control unit 20 is electrically connected to each lighting device 10 It can also control the turning on or off of the light source 100 in each lighting device. The control unit 20 includes but is not limited to a CPU, a mobile terminal, a computer, etc. Through the control unit 20, the light source in each lighting device 10 can be controlled to achieve more Conveniently control the lighting system and improve the stability and reliability of the lighting system.

As just an example, the above-mentioned lighting system can be used as a spotlight or other lighting.

The above descriptions are only preferred embodiments of the application, and are not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

A lighting device, characterized in that it comprises:

A light source, the light source is used to emit light;

A first lens group, the first lens group receives and transmits the light;

A second lens group, the second lens group includes a condenser lens and a field lens, the condenser lens is located between the first lens group and the field lens; and

The filter set includes a first filter and a second filter, the first filter is disposed between the condenser lens and the field lens, and the second filter The sheet is arranged between the field lens and the focal plane of the second lens group.
The lighting device according to claim 1, wherein the filter set comprises at least one yellow filter, at least one magenta filter, at least one cyan filter, and at least one color temperature reducing film; The first filter is selected from a combination of one or more of the yellow filter, the magenta filter, the cyan filter, and the color temperature reducing film, and the second filter The light sheet is selected from one or a combination of the yellow color filter, the magenta color filter, the cyan color filter, and the color temperature reduction sheet.
The lighting device according to claim 2, wherein the second filter includes at least the magenta filter.
The lighting device according to claim 2, wherein any one of the yellow filter, the magenta filter, the cyan filter, and the color temperature reducing film comprises a substrate and a filter Optical film, the filter film includes a laminated first region and a second region, the second region covers the surface of the substrate, the first region covers the surface of the second region, and the second region covers the surface of the second region. The area has a uniform thickness, the first area has a non-uniform thickness, and the first area faces the incident direction of the light.
The lighting device according to claim 4, wherein the thickness of the second area is greater than or equal to the maximum thickness of the first area.
The lighting device according to claim 1, wherein the first lens group comprises:

A collimating lens, the collimating lens receives and transmits light emitted by the light source, the light source includes a plurality of light source units, the collimating lens includes a plurality of collimating lens units, each of the light source units is connected to the light source The collimating lens units are arranged in one-to-one correspondence;

A fly-eye lens group, the fly-eye lens group receives and transmits the light rays emitted from the collimator lens.
7. The lighting device according to claim 6, wherein the fly-eye lens group comprises a first fly-eye lens and a second fly-eye lens, and the first fly-eye lens and the second fly-eye lens are spaced apart and are mirror images of each other.
8. The lighting device of claim 7, wherein the second fly-eye lens is located at the focal point of the first fly-eye lens.
8. The lighting device according to claim 8, wherein the condenser lens and the field lens are both convex lenses.
A lighting system, characterized by comprising a plurality of lighting devices according to any one of claims 1-9 and a control unit for controlling the lighting devices.